Convection is the transfer of heat by liquid.
Chemical. burning is a chemical change
Answer:
C) low activation energy of forward reaction
Explanation:
Activation energy for the forward reaction is the quantity of free energy which is needed for a reaction to move from the reactant phase of energy level to the transition state of energy level. The higher the rate of energy level, the slower the chemical reaction.
Activation energy is a barrier that must be overcome for a reaction to take place.
<h3>
Answer:</h3>
380,520 Joules
<h3>
Explanation:</h3>
- Quantity of heat,Q is calculated by multiplying the mass, m of a substance by specific heat capacity, c of the substances and the change in temperature, Δt.
That is;
Q = m×c×Δt
In the question above;
Mass of glass is 15.1 kg
Change in temperature = 45°C - 15 °C
= 30°C
Specific heat capacity of glass = 840 J/kg/°C
Therefore;
Quantity of heat, Q = 15.1 kg × 840 J/kg/°C × 30°C
= 380,520 Joules
Hence, it takes 380,520 Joules to heat up 15.1 kg of glass from 15°C to 45°C.
Answer is: <span>5. one pair of electrons and two lone electrons.
Electron configuration for carbon: </span>₆C 1s² 2s² 2p².
Valence electrons are in 2s and 2p orbitals. There is one pair of electrons in 2s orbital and two lone electrons in 2p orbital with the same electron spin. Carbon is in group 14 of periodic table group.
